From (@Slate):

There's a porn monopoly, and its name is MindGeek: http://t.co/tqqnIR2cRt

"MindGeek is a porn provider. Or more accurately, the porn provider. Mindgeek has become the porn monopoly, putting industry members in the paradoxical position of working for the very company that profits from the piracy of their work. The Mindgeek hydra exerts so much force that people in the online-porn industry are scared to talk about it for fear of blacklisting. And Mindgeek’s dominance should serve as a cautionary tale of the dangers of consolidating production and distribution in a single monopolistic owner...

According to porn-industry blogger Mike South, MindGeek now owns eight of the top 10 of these aggregator sites (the exceptions being xHamster and Xvideos). These sites, whether owned by MindGeek or not, notoriously host a lot of pirated content. While each individual tube site responds to Digital Millennium Copyright Act (DMCA) take down requests, most porn producers do not have the resources of movie studios or record labels to monitor piracy; according to adult film star Siri, MindGeek’s sites “force copyright holders to jump through hoops to get our content removed.” South told me that consequently, production of porn films is down 75 percent from where it was eight years ago, and DVD sales down 50 percent in that time. The general sentiment is that the porn business crash around 2008 was due to the rise of wide scale piracy on tube sites and torrents, an increase in amateur porn, and the Great Recession.